SYSTEM FOR CONTROLLING TORQUE BETWEEN A NON-DRIVEN PORTION AND A DRIVE PORTION OF A 4X4 VEHICLE DRIVE TRAIN SO AS TO REDUCE COUGHING NOISE

摘要

The invention relates to a system for controlling the torque (20) between a non-driven portion and a drive portion of a drive train of a motor vehicle (1) having four-wheel drive (2d, 2g, 3d, 3g). The vehicle includes a coupler (11) for applying a torque value between the non-driven portion and the drive portion. The system includes: a first calculation means that is capable of determining a nominal torque value; a second calculation means that is capable of determining a saturated torque value; a means for detecting application conditions, which is capable of detecting if the conditions for applying said torque have been checked; and a means for selecting the torque value that the coupler (11) should apply in order to reduce the noise and vibrations in the non-driven portion of the drive train.